What Does It Mean To Have Parfocal Objectives - Web when put together, a parfocal objective means you can change the objective without having to readjust the focus. Parfocal refers to the ability to change objectives with differing powers and have the focus remain sharp.
Parfocal refers to the ability to change objectives with differing powers and have the focus remain sharp. Web when put together, a parfocal objective means you can change the objective without having to readjust the focus.